Finally, you can make your own apps for SharePoint. But why would you?
This is different to the previous SharePoint 2010 version that would make you install your code directly to SharePoint’s servers and hope it worked without issue. Now SharePoint 2013 lets your app remotely access SharePoint and perform as it was programmed to do, all while being displayed inside the SharePoint UI, making it look like just another part of the site.
Now IT and developers can create apps, plug-and-play as needed and have them show up in SharePoint. It’s another nod to the power of the cloud – integrating customization with functionality.